A new type of coaxial counter-rotating turbine drill tool

By designing a novel coaxial counter-rotating turbine drill bit with a jet motor, the torque is increased and the rotation speed is reduced by utilizing the tangential jet and axial flow pressure function of the turbine rotor and stator structure. This enables the counter-rotation of the leading drill bit and the reaming drill bit, solving the problems of low torque and long drilling time in existing turbine drill bits, and improving drilling efficiency and rock breaking effect.

CN117365270BActive Publication Date: 2026-07-24NORTHEAST GASOLINEEUM UNIV
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Patent Information

Application Number
CN202311515516.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-15
Publication Date
2026-07-24
Estimated Expiration
2043-11-15

AI Technical Summary

Technical Problem

The high rotation speed of existing turbine drill bits results in low drill bit torque and low drilling efficiency. Existing reaming drilling processes are time-consuming and pose safety hazards. Existing turbine drill bits with reducers have complex structures and are difficult to apply.

Method used

A novel coaxial counter-rotating turbine drill bit with jet motor is designed. Through the design of turbine rotor and stator structure, combined with tangential jet and axial flow pressure functions, the energy utilization rate is improved, the torque is increased and the speed is reduced. At the same time, the planetary gear train is used to realize the counter-rotation of the leading drill bit and the reaming drill bit, simplifying the drilling process.

Benefits of technology

It improves drilling efficiency, reduces production costs, simplifies downhole procedures, enhances rock-breaking effects, and adapts to complex working conditions under different geological conditions.

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Abstract

The application belongs to the technical field of petroleum drilling equipment, and particularly relates to a novel coaxial counter-rotating turbine drilling tool of a jet flow motor, which comprises an upper joint, a turbine sleeve, an upper bearing, a central turbine shaft, a pressing nut, a turbine group, a height increasing ring, a connecting sleeve, an intermediate bearing, a gear outer sleeve, a week gear train, a lower bearing, a lower joint, an underreaming bit connecting shaft, an underreaming bit and a pilot bit. The turbine group is composed of a turbine stator and a turbine rotor. The week gear train comprises an input gear, a gear frame, a fastening nut, an intermediate gear, a sliding shaft sleeve, a positioning nut and an output gear. The upper joint, the turbine sleeve, the connecting sleeve, the gear outer sleeve and the lower joint are sequentially threadedly connected. The pilot bit is threadedly connected with the central turbine shaft, and the underreaming bit is threadedly connected with the underreaming bit connecting shaft. The turbine stator is installed on the turbine sleeve through interference fit, and the turbine rotor and the height increasing ring are sleeved on the central turbine shaft. The drilling tool improves drilling efficiency and reduces production cost.
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